December weather forecastSanta Clara, CA
December
Weather in December
Santa Clara, California welcomes December with a baby step into the winter, exhibiting the lowest average temperatures of the year. The fall of mercury offers a stark contrast against the preceding month, wrapping the city in a cool, calming ambiance. The amount of rainfall reaches its yearly high in December, with the lush green spaces drinking in the nourishment gratefully. Despite the chilly temperatures and high precipitation, outdoor activities continue, albeit at a more subdued pace. The unique blend of cool temperatures, between 43.5°F (6.4°C) to 56.7°F (13.7°C), and the festive holiday vibe, make December in Santa Clara a truly enchanting time.Temperature
In Santa Clara, December is the month with the lowest recorded average temperatures, measuring a high of 56.7°F (13.7°C) and a low of 43.5°F (6.4°C).Humidity
In December, the average relative humidity is 71%.Rainfall
In Santa Clara, in December, during 9.8 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Santa Clara, during the entire year, the rain falls for 70.2 days and collects up to 9.8" (249mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:04 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:00 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In December, the UV index of 3 transforms into the following advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Santa Clara, CA
- Average high temperature in December: 56.7°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is December (56.7°F).
- Average low temperature in December: 43.5°F
The month with the highest average low temperature is August (56.3°F).
The coldest months (with the lowest average low temperature) are January and February (43.3°F).
Average pressure in December
Santa Clara, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Santa Clara, CA
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in December
Santa Clara, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July and September (61%).
Average rainfall in December
Santa Clara, CA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is March (1.77").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Santa Clara, CA
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is March (12.9 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Santa Clara, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Santa Clara, CA
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (16.7 days).
Average UV index in December
Santa Clara, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Santa Clara, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in December
Santa Clara, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
